Police have issued warnings to shoppers following the discovery of sophisticated card skimming devices at gas stations in Southampton, Massachusetts, and Garden Grove, California. A skimmer found at a Cumberland Farms in Southampton prompted local authorities to advise customers to monitor their bank accounts for any unusual activity. Similarly, in Garden Grove, police uncovered a nearly indistinguishable skimmer attached to a gas pump, capable of capturing card information and PINs, with unknown potential victims. Officials are urging consumers to inspect card readers for signs of tampering and to use tap payment methods as a preventive measure. Card skimming is a growing concern, costing consumers and banks over $1 billion annually, with multiple cases reported across the nation in recent weeks. Authorities recommend that shoppers regularly review their bank statements and take precautions to avoid falling victim to these scams.